mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
   5  *
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; either version 2 of the License, or
  10  *    (at your option) any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  *    You should have received a copy of the GNU General Public License
  18  *    along with this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  *    Author: Neil Brown
  22  *    Email: <neilb@suse.de>
  23  *
  24  *    Additions for bitmap and write-behind RAID options, Copyright (C) 2003-2004,
  25  *    Paul Clements, SteelEye Technology, Inc.
  26  */
  27
  28 #include "mdadm.h"
  29 #include "md_p.h"
  30 #include <ctype.h>
  31
  32
  33 int main(int argc, char *argv[])
  34 {
  35         int mode = 0;
  36         int opt;
  37         int option_index;
  38         char *c;
  39         int rv;
  40         int i;
  41
  42         int chunk = 0;
  43         long long size = -1;
  44         long long array_size = -1;
  45         int level = UnSet;
  46         int layout = UnSet;
  47         char *layout_str = NULL;
  48         int raiddisks = 0;
  49         int sparedisks = 0;
  50         struct mddev_ident_s ident;
  51         char *configfile = NULL;
  52         char *cp;
  53         char *update = NULL;
  54         int scan = 0;
  55         char devmode = 0;
  56         int runstop = 0;
  57         int readonly = 0;
  58         int write_behind = 0;
  59         int bitmap_fd = -1;
  60         char *bitmap_file = NULL;
  61         char *backup_file = NULL;
  62         int bitmap_chunk = UnSet;
  63         int SparcAdjust = 0;
  64         mddev_dev_t devlist = NULL;
  65         mddev_dev_t *devlistend = & devlist;
  66         mddev_dev_t dv;
  67         int devs_found = 0;
  68         int verbose = 0;
  69         int quiet = 0;
  70         int brief = 0;
  71         int force = 0;
  72         int test = 0;
  73         int export = 0;
  74         int assume_clean = 0;
  75         char *symlinks = NULL;
  76         /* autof indicates whether and how to create device node.
  77          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  78          * 0  - unset
  79          * 1  - don't create (no)
  80          * 2  - if is_standard, then create (yes)
  81          * 3  - create as 'md' - reject is_standard mdp (md)
  82          * 4  - create as 'mdp' - reject is_standard md (mdp)
  83          * 5  - default to md if not is_standard (md in config file)
  84          * 6  - default to mdp if not is_standard (part, or mdp in config file)
  85          */
  86         int autof = 0;
  87
  88         char *homehost = NULL;
  89         char sys_hostname[256];
  90         int require_homehost = 1;
  91         char *mailaddr = NULL;
  92         char *program = NULL;
  93         int increments = 20;
  94         int delay = 0;
  95         int daemonise = 0;
  96         char *pidfile = NULL;
  97         int oneshot = 0;
  98         struct supertype *ss = NULL;
  99         int writemostly = 0;
 100         int re_add = 0;
 101         char *shortopt = short_options;
 102         int dosyslog = 0;
 103         int rebuild_map = 0;
 104         int auto_update_home = 0;
 105         char *subarray = NULL;
 106
 107         int print_help = 0;
 108         FILE *outf;
 109
 110         int mdfd = -1;
 111
 112         srandom(time(0) ^ getpid());
 113
 114         ident.uuid_set=0;
 115         ident.level = UnSet;
 116         ident.raid_disks = UnSet;
 117         ident.super_minor= UnSet;
 118         ident.devices=0;
 119         ident.spare_group = NULL;
 120         ident.autof = 0;
 121         ident.st = NULL;
 122         ident.bitmap_fd = -1;
 123         ident.bitmap_file = NULL;
 124         ident.name[0] = 0;
 125         ident.container = NULL;
 126         ident.member = NULL;
 127
 128         while ((option_index = -1) ,
 129                (opt=getopt_long(argc, argv,
 130                                 shortopt, long_options,
 131                                 &option_index)) != -1) {
 132                 int newmode = mode;
 133                 /* firstly, some mode-independent options */
 134                 switch(opt) {
 135                 case 'h':
 136                         if (option_index > 0 &&
 137                             strcmp(long_options[option_index].name, "help-options")==0)
 138                                 print_help = 2;
 139                         else
 140                                 print_help = 1;
 141                         continue;
 142
 143                 case 'V':
 144                         fputs(Version, stderr);
 145                         exit(0);
 146
 147                 case 'v': verbose++;
 148                         continue;
 149
 150                 case 'q': quiet++;
 151                         continue;
 152
 153                 case 'b':
 154                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW ||
 155                             mode == INCREMENTAL || mode == MANAGE)
 156                                 break; /* b means bitmap */
 157                         brief = 1;
 158                         continue;
 159
 160                 case 'Y': export++;
 161                         continue;
 162
 163                 case HomeHost:
 164                         if (strcasecmp(optarg, "<ignore>") == 0)
 165                                 require_homehost = 0;
 166                         else
 167                                 homehost = optarg;
 168                         continue;
 169
 170                 case ':':
 171                 case '?':
 172                         fputs(Usage, stderr);
 173                         exit(2);
 174                 }
 175                 /* second, figure out the mode.
 176                  * Some options force the mode.  Others
 177                  * set the mode if it isn't already
 178                  */
 179
 180                 switch(opt) {
 181                 case '@': /* just incase they say --manage */
 182                         newmode = MANAGE;
 183                         shortopt = short_bitmap_options;
 184                         break;
 185                 case 'a':
 186                 case 'r':
 187                 case 'f':
 188                 case ReAdd: /* re-add */
 189                         if (!mode) {
 190                                 newmode = MANAGE;
 191                                 shortopt = short_bitmap_options;
 192                         }
 193                         break;
 194
 195                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
 196                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
 197                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
 198                 case 'F': newmode = MONITOR;break;
 199                 case 'G': newmode = GROW;
 200                         shortopt = short_bitmap_options;
 201                         break;
 202                 case 'I': newmode = INCREMENTAL;
 203                         shortopt = short_bitmap_auto_options; break;
 204                 case AutoDetect:
 205                         newmode = AUTODETECT; break;
 206
 207                 case '#':
 208                 case 'D':
 209                 case 'E':
 210                 case 'X':
 211                 case 'Q': newmode = MISC; break;
 212                 case 'R':
 213                 case 'S':
 214                 case 'o':
 215                 case 'w':
 216                 case 'W':
 217                 case Waitclean:
 218                 case DetailPlatform:
 219                 case KillSubarray:
 220                 case UpdateSubarray:
 221                         if (opt == KillSubarray || opt == UpdateSubarray) {
 222                                 if (subarray) {
 223                                         fprintf(stderr, Name ": subarray can only be specified once\n");
 224                                         exit(2);
 225                                 }
 226                                 subarray = optarg;
 227                         }
 228                 case 'K': if (!mode) newmode = MISC; break;
 229                 }
 230                 if (mode && newmode == mode) {
 231                         /* everybody happy ! */
 232                 } else if (mode && newmode != mode) {
 233                         /* not allowed.. */
 234                         fprintf(stderr, Name ": ");
 235                         if (option_index >= 0)
 236                                 fprintf(stderr, "--%s", long_options[option_index].name);
 237                         else
 238                                 fprintf(stderr, "-%c", opt);
 239                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 240                                 map_num(modes, newmode),
 241                                 map_num(modes, mode));
 242                         exit(2);
 243                 } else if (!mode && newmode) {
 244                         mode = newmode;
 245                 } else {
 246                         /* special case of -c --help */
 247                         if (opt == 'c' &&
 248                             ( strncmp(optarg, "--h", 3)==0 ||
 249                               strncmp(optarg, "-h", 2)==0)) {
 250                                 fputs(Help_config, stdout);
 251                                 exit(0);
 252                         }
 253
 254                         /* If first option is a device, don't force the mode yet */
 255                         if (opt == 1) {
 256                                 if (devs_found == 0) {
 257                                         dv = malloc(sizeof(*dv));
 258                                         if (dv == NULL) {
 259                                                 fprintf(stderr, Name ": malloc failed\n");
 260                                                 exit(3);
 261                                         }
 262                                         dv->devname = optarg;
 263                                         dv->disposition = devmode;
 264                                         dv->writemostly = writemostly;
 265                                         dv->re_add = re_add;
 266                                         dv->used = 0;
 267                                         dv->content = NULL;
 268                                         dv->next = NULL;
 269                                         *devlistend = dv;
 270                                         devlistend = &dv->next;
 271
 272                                         devs_found++;
 273                                         continue;
 274                                 }
 275                                 /* No mode yet, and this is the second device ... */
 276                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device\n"
 277                                         "       (%s) is listed\n", optarg);
 278                                 exit(2);
 279                         }
 280                         if (option_index >= 0)
 281                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
 282                         else
 283                                 fprintf(stderr, Name ": -%c", opt);
 284                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 285                         exit(2);
 286                 }
 287
 288                 /* if we just set the mode, then done */
 289                 switch(opt) {
 290                 case '@':
 291                 case '#':
 292                 case 'A':
 293                 case 'B':
 294                 case 'C':
 295                 case 'F':
 296                 case 'G':
 297                 case 'I':
 298                 case AutoDetect:
 299                         continue;
 300                 }
 301                 if (opt == 1) {
 302                         /* an undecorated option - must be a device name.
 303                          */
 304                         if (devs_found > 0 && mode == '@' && !devmode) {
 305                                 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
 306                                 exit(2);
 307                         }
 308                         if (devs_found > 0 && mode == 'G' && !devmode) {
 309                                 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
 310                                 exit(2);
 311                         }
 312                         dv = malloc(sizeof(*dv));
 313                         if (dv == NULL) {
 314                                 fprintf(stderr, Name ": malloc failed\n");
 315                                 exit(3);
 316                         }
 317                         dv->devname = optarg;
 318                         dv->disposition = devmode;
 319                         dv->writemostly = writemostly;
 320                         dv->re_add = re_add;
 321                         dv->used = 0;
 322                         dv->content = NULL;
 323                         dv->next = NULL;
 324                         *devlistend = dv;
 325                         devlistend = &dv->next;
 326
 327                         devs_found++;
 328                         continue;
 329                 }
 330
 331                 /* We've got a mode, and opt is now something else which
 332                  * could depend on the mode */
 333 #define O(a,b) ((a<<8)|b)
 334                 switch (O(mode,opt)) {
 335                 case O(GROW,'c'):
 336                 case O(CREATE,'c'):
 337                 case O(BUILD,'c'): /* chunk or rounding */
 338                         if (chunk) {
 339                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 340                                         "Second value is %s.\n", optarg);
 341                                 exit(2);
 342                         }
 343                         chunk = strtol(optarg, &c, 10);
 344                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
 345                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 346                                         optarg);
 347                                 exit(2);
 348                         }
 349                         continue;
 350
 351 #if 0
 352                 case O(ASSEMBLE,AutoHomeHost):
 353                         auto_update_home = 1;
 354                         continue;
 355 #endif
 356                 case O(INCREMENTAL, 'e'):
 357                 case O(CREATE,'e'):
 358                 case O(ASSEMBLE,'e'):
 359                 case O(MISC,'e'): /* set metadata (superblock) information */
 360                         if (ss) {
 361                                 fprintf(stderr, Name ": metadata information already given\n");
 362                                 exit(2);
 363                         }
 364                         for(i=0; !ss && superlist[i]; i++)
 365                                 ss = superlist[i]->match_metadata_desc(optarg);
 366
 367                         if (!ss) {
 368                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
 369                                 exit(2);
 370                         }
 371                         continue;
 372
 373                 case O(MANAGE,'W'):
 374                 case O(BUILD,'W'):
 375                 case O(CREATE,'W'):
 376                         /* set write-mostly for following devices */
 377                         writemostly = 1;
 378                         continue;
 379
 380                 case O(MANAGE,'w'):
 381                         /* clear write-mostly for following devices */
 382                         writemostly = 2;
 383                         continue;
 384
 385
 386                 case O(GROW,'z'):
 387                 case O(CREATE,'z'):
 388                 case O(BUILD,'z'): /* size */
 389                         if (size >= 0) {
 390                                 fprintf(stderr, Name ": size may only be specified once. "
 391                                         "Second value is %s.\n", optarg);
 392                                 exit(2);
 393                         }
 394                         if (strcmp(optarg, "max")==0)
 395                                 size = 0;
 396                         else {
 397                                 size = parse_size(optarg);
 398                                 if (size < 8) {
 399                                         fprintf(stderr, Name ": invalid size: %s\n",
 400                                                 optarg);
 401                                         exit(2);
 402                                 }
 403                                 /* convert sectors to K */
 404                                 size /= 2;
 405                         }
 406                         continue;
 407
 408                 case O(GROW,'Z'): /* array size */
 409                         if (array_size >= 0) {
 410                                 fprintf(stderr, Name ": array-size may only be specified once. "
 411                                         "Second value is %s.\n", optarg);
 412                                 exit(2);
 413                         }
 414                         if (strcmp(optarg, "max") == 0)
 415                                 array_size = 0;
 416                         else {
 417                                 array_size = parse_size(optarg);
 418                                 if (array_size <= 0) {
 419                                         fprintf(stderr, Name ": invalid array size: %s\n",
 420                                                 optarg);
 421                                         exit(2);
 422                                 }
 423                         }
 424                         continue;
 425
 426                 case O(GROW,'l'):
 427                 case O(CREATE,'l'):
 428                 case O(BUILD,'l'): /* set raid level*/
 429                         if (level != UnSet) {
 430                                 fprintf(stderr, Name ": raid level may only be set once.  "
 431                                         "Second value is %s.\n", optarg);
 432                                 exit(2);
 433                         }
 434                         level = map_name(pers, optarg);
 435                         if (level == UnSet) {
 436                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 437                                         optarg);
 438                                 exit(2);
 439                         }
 440                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 441                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 442                             level != 10 &&
 443                             mode == BUILD) {
 444                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 445                                         optarg);
 446                                 exit(2);
 447                         }
 448                         if (sparedisks > 0 && level < 1 && level >= -1) {
 449                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 450                                         optarg);
 451                                 exit(2);
 452                         }
 453                         ident.level = level;
 454                         continue;
 455
 456                 case O(GROW, 'p'): /* new layout */
 457                         if (layout_str) {
 458                                 fprintf(stderr,Name ": layout may only be sent once.  "
 459                                         "Second value was %s\n", optarg);
 460                                 exit(2);
 461                         }
 462                         layout_str = optarg;
 463                         /* 'Grow' will parse the value */
 464                         continue;
 465
 466                 case O(CREATE,'p'): /* raid5 layout */
 467                 case O(BUILD,'p'): /* faulty layout */
 468                         if (layout != UnSet) {
 469                                 fprintf(stderr,Name ": layout may only be sent once.  "
 470                                         "Second value was %s\n", optarg);
 471                                 exit(2);
 472                         }
 473                         switch(level) {
 474                         default:
 475                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 476                                         map_num(pers, level));
 477                                 exit(2);
 478                         case UnSet:
 479                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 480                                 exit(2);
 481
 482                         case 5:
 483                                 layout = map_name(r5layout, optarg);
 484                                 if (layout==UnSet) {
 485                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 486                                                 optarg);
 487                                         exit(2);
 488                                 }
 489                                 break;
 490                         case 6:
 491                                 layout = map_name(r6layout, optarg);
 492                                 if (layout==UnSet) {
 493                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
 494                                                 optarg);
 495                                         exit(2);
 496                                 }
 497                                 break;
 498
 499                         case 10:
 500                                 layout = parse_layout_10(optarg);
 501                                 if (layout < 0) {
 502                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 503                                         exit(2);
 504                                 }
 505                                 break;
 506                         case LEVEL_FAULTY:
 507                                 /* Faulty
 508                                  * modeNNN
 509                                  */
 510                                 layout = parse_layout_faulty(optarg);
 511                                 if (layout == -1) {
 512                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 513                                                 optarg);
 514                                         exit(2);
 515                                 }
 516                                 break;
 517                         }
 518                         continue;
 519
 520                 case O(CREATE,AssumeClean):
 521                 case O(BUILD,AssumeClean): /* assume clean */
 522                         assume_clean = 1;
 523                         continue;
 524
 525                 case O(GROW,'n'):
 526                 case O(CREATE,'n'):
 527                 case O(BUILD,'n'): /* number of raid disks */
 528                         if (raiddisks) {
 529                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 530                                         raiddisks, optarg);
 531                                 exit(2);
 532                         }
 533                         raiddisks = strtol(optarg, &c, 10);
 534                         if (!optarg[0] || *c || raiddisks<=0) {
 535                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 536                                         optarg);
 537                                 exit(2);
 538                         }
 539                         ident.raid_disks = raiddisks;
 540                         continue;
 541
 542                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 543                         if (sparedisks) {
 544                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 545                                         sparedisks, optarg);
 546                                 exit(2);
 547                         }
 548                         if (level != UnSet && level <= 0 && level >= -1) {
 549                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 550                                         level);
 551                                 exit(2);
 552                         }
 553                         sparedisks = strtol(optarg, &c, 10);
 554                         if (!optarg[0] || *c || sparedisks < 0) {
 555                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 556                                         optarg);
 557                                 exit(2);
 558                         }
 559                         continue;
 560
 561                 case O(CREATE,'a'):
 562                 case O(BUILD,'a'):
 563                 case O(INCREMENTAL,'a'):
 564                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
 565                         autof = parse_auto(optarg, "--auto flag", 0);
 566                         continue;
 567
 568                 case O(CREATE,Symlinks):
 569                 case O(BUILD,Symlinks):
 570                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 571                         symlinks = optarg;
 572                         continue;
 573
 574                 case O(BUILD,'f'): /* force honouring '-n 1' */
 575                 case O(GROW,'f'): /* ditto */
 576                 case O(CREATE,'f'): /* force honouring of device list */
 577                 case O(ASSEMBLE,'f'): /* force assembly */
 578                 case O(MISC,'f'): /* force zero */
 579                         force=1;
 580                         continue;
 581
 582                         /* now for the Assemble options */
 583                 case O(CREATE,'u'): /* uuid of array */
 584                 case O(ASSEMBLE,'u'): /* uuid of array */
 585                         if (ident.uuid_set) {
 586                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 587                                         "Second value %s.\n", optarg);
 588                                 exit(2);
 589                         }
 590                         if (parse_uuid(optarg, ident.uuid))
 591                                 ident.uuid_set = 1;
 592                         else {
 593                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 594                                 exit(2);
 595                         }
 596                         continue;
 597
 598                 case O(CREATE,'N'):
 599                 case O(ASSEMBLE,'N'):
 600                 case O(MISC,'N'):
 601                         if (ident.name[0]) {
 602                                 fprintf(stderr, Name ": name cannot be set twice.   "
 603                                         "Second value %s.\n", optarg);
 604                                 exit(2);
 605                         }
 606                         if (mode == MISC && !subarray) {
 607                                 fprintf(stderr, Name ": -N/--name only valid with --update-subarray in misc mode\n");
 608                                 exit(2);
 609                         }
 610                         if (strlen(optarg) > 32) {
 611                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
 612                                         optarg);
 613                                 exit(2);
 614                         }
 615                         strcpy(ident.name, optarg);
 616                         continue;
 617
 618                 case O(ASSEMBLE,'m'): /* super-minor for array */
 619                         if (ident.super_minor != UnSet) {
 620                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 621                                         "Second value: %s.\n", optarg);
 622                                 exit(2);
 623                         }
 624                         if (strcmp(optarg, "dev")==0)
 625                                 ident.super_minor = -2;
 626                         else {
 627                                 ident.super_minor = strtoul(optarg, &cp, 10);
 628                                 if (!optarg[0] || *cp) {
 629                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 630                                         exit(2);
 631                                 }
 632                         }
 633                         continue;
 634
 635                 case O(ASSEMBLE,'U'): /* update the superblock */
 636                 case O(MISC,'U'):
 637                         if (update) {
 638                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 639                                         update, optarg);
 640                                 exit(2);
 641                         }
 642                         if (mode == MISC && !subarray) {
 643                                 fprintf(stderr, Name ": Only subarrays can be updated in misc mode\n");
 644                                 exit(2);
 645                         }
 646                         update = optarg;
 647                         if (strcmp(update, "sparc2.2")==0)
 648                                 continue;
 649                         if (strcmp(update, "super-minor") == 0)
 650                                 continue;
 651                         if (strcmp(update, "summaries")==0)
 652                                 continue;
 653                         if (strcmp(update, "resync")==0)
 654                                 continue;
 655                         if (strcmp(update, "uuid")==0)
 656                                 continue;
 657                         if (strcmp(update, "name")==0)
 658                                 continue;
 659                         if (strcmp(update, "homehost")==0)
 660                                 continue;
 661                         if (strcmp(update, "devicesize")==0)
 662                                 continue;
 663                         if (strcmp(update, "byteorder")==0) {
 664                                 if (ss) {
 665                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
 666                                         exit(2);
 667                                 }
 668                                 for(i=0; !ss && superlist[i]; i++)
 669                                         ss = superlist[i]->match_metadata_desc("0.swap");
 670                                 if (!ss) {
 671                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
 672                                         exit(2);
 673                                 }
 674
 675                                 continue;
 676                         }
 677                         if (strcmp(update,"?") == 0 ||
 678                             strcmp(update, "help") == 0) {
 679                                 outf = stdout;
 680                                 fprintf(outf, Name ": ");
 681                         } else {
 682                                 outf = stderr;
 683                                 fprintf(outf,
 684                                         Name ": '--update=%s' is invalid.  ",
 685                                         update);
 686                         }
 687                         fprintf(outf, "Valid --update options are:\n"
 688                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 689                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
 690                         exit(outf == stdout ? 0 : 2);
 691
 692                 case O(INCREMENTAL,NoDegraded):
 693                         fprintf(stderr, Name ": --no-degraded is deprecated in Incremental mode\n");
 694                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 695                         runstop = -1; /* --stop isn't allowed for --assemble,
 696                                        * so we overload slightly */
 697                         continue;
 698
 699                 case O(ASSEMBLE,'c'): /* config file */
 700                 case O(INCREMENTAL, 'c'):
 701                 case O(MISC, 'c'):
 702                 case O(MONITOR,'c'):
 703                         if (configfile) {
 704                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 705                                         "Second value is %s.\n", optarg);
 706                                 exit(2);
 707                         }
 708                         configfile = optarg;
 709                         set_conffile(configfile);
 710                         /* FIXME possibly check that config file exists.  Even parse it */
 711                         continue;
 712                 case O(ASSEMBLE,'s'): /* scan */
 713                 case O(MISC,'s'):
 714                 case O(MONITOR,'s'):
 715                 case O(INCREMENTAL,'s'):
 716                         scan = 1;
 717                         continue;
 718
 719                 case O(MONITOR,'m'): /* mail address */
 720                         if (mailaddr)
 721                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 722                                         optarg);
 723                         else
 724                                 mailaddr = optarg;
 725                         continue;
 726
 727                 case O(MONITOR,'p'): /* alert program */
 728                         if (program)
 729                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 730                                         optarg);
 731                         else
 732                                 program = optarg;
 733                         continue;
 734
 735                 case O(MONITOR,'r'): /* rebuild increments */
 736                         increments = atoi(optarg);
 737                         if (increments>99 || increments<1) {
 738                                 fprintf(stderr, Name ": please specify positive integer between 1 and 99 as rebuild increments.\n");
 739                                 exit(2);
 740                         }
 741                         continue;
 742
 743                 case O(MONITOR,'d'): /* delay in seconds */
 744                 case O(GROW, 'd'):
 745                 case O(BUILD,'d'): /* delay for bitmap updates */
 746                 case O(CREATE,'d'):
 747                         if (delay)
 748                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 749                                         optarg);
 750                         else {
 751                                 delay = strtol(optarg, &c, 10);
 752                                 if (!optarg[0] || *c || delay<1) {
 753                                         fprintf(stderr, Name ": invalid delay: %s\n",
 754                                                 optarg);
 755                                         exit(2);
 756                                 }
 757                         }
 758                         continue;
 759                 case O(MONITOR,'f'): /* daemonise */
 760                         daemonise = 1;
 761                         continue;
 762                 case O(MONITOR,'i'): /* pid */
 763                         if (pidfile)
 764                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 765                                         optarg);
 766                         else
 767                                 pidfile = optarg;
 768                         continue;
 769                 case O(MONITOR,'1'): /* oneshot */
 770                         oneshot = 1;
 771                         continue;
 772                 case O(MONITOR,'t'): /* test */
 773                         test = 1;
 774                         continue;
 775                 case O(MONITOR,'y'): /* log messages to syslog */
 776                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 777                         dosyslog = 1;
 778                         continue;
 779
 780                         /* now the general management options.  Some are applicable
 781                          * to other modes. None have arguments.
 782                          */
 783                 case O(GROW,'a'):
 784                 case O(MANAGE,'a'): /* add a drive */
 785                         devmode = 'a';
 786                         re_add = 0;
 787                         continue;
 788                 case O(MANAGE,ReAdd):
 789                         devmode = 'a';
 790                         re_add = 1;
 791                         continue;
 792                 case O(MANAGE,'r'): /* remove a drive */
 793                         devmode = 'r';
 794                         continue;
 795                 case O(MANAGE,'f'): /* set faulty */
 796                 case O(INCREMENTAL,'f'): /* r for incremental is taken, use f
 797                                           * even though we will both fail and
 798                                           * remove the device */
 799                         devmode = 'f';
 800                         continue;
 801                 case O(INCREMENTAL,'R'):
 802                 case O(MANAGE,'R'):
 803                 case O(ASSEMBLE,'R'):
 804                 case O(BUILD,'R'):
 805                 case O(CREATE,'R'): /* Run the array */
 806                         if (runstop < 0) {
 807                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 808                                 exit(2);
 809                         }
 810                         runstop = 1;
 811                         continue;
 812                 case O(MANAGE,'S'):
 813                         if (runstop > 0) {
 814                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 815                                 exit(2);
 816                         }
 817                         runstop = -1;
 818                         continue;
 819                 case O(MANAGE,'t'):
 820                         test = 1;
 821                         continue;
 822
 823                 case O(MISC,'Q'):
 824                 case O(MISC,'D'):
 825                 case O(MISC,'E'):
 826                 case O(MISC,'K'):
 827                 case O(MISC,'R'):
 828                 case O(MISC,'S'):
 829                 case O(MISC,'X'):
 830                 case O(MISC,'o'):
 831                 case O(MISC,'w'):
 832                 case O(MISC,'W'):
 833                 case O(MISC, Waitclean):
 834                 case O(MISC, DetailPlatform):
 835                 case O(MISC, KillSubarray):
 836                 case O(MISC, UpdateSubarray):
 837                         if (devmode && devmode != opt &&
 838                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 839                                 fprintf(stderr, Name ": --examine/-E cannot be given with ");
 840                                 if (devmode == 'E') {
 841                                         if (option_index >= 0)
 842                                                 fprintf(stderr, "--%s\n",
 843                                                         long_options[option_index].name);
 844                                         else
 845                                                 fprintf(stderr, "-%c\n", opt);
 846                                 } else if (isalpha(devmode))
 847                                         fprintf(stderr, "-%c\n", devmode);
 848                                 else
 849                                         fprintf(stderr, "previous option\n");
 850                                 exit(2);
 851                         }
 852                         devmode = opt;
 853                         continue;
 854                 case O(MISC,'t'):
 855                         test = 1;
 856                         continue;
 857
 858                 case O(MISC, Sparc22):
 859                         if (devmode != 'E') {
 860                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 861                                 exit(2);
 862                         }
 863                         SparcAdjust = 1;
 864                         continue;
 865
 866                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 867                         if (!optarg) {
 868                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
 869                                 exit(2);
 870                         }
 871                         if (strcmp(optarg, "internal")==0) {
 872                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
 873                                 continue;
 874                         }
 875                         bitmap_fd = open(optarg, O_RDWR);
 876                         if (!*optarg || bitmap_fd < 0) {
 877                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
 878                                 exit(2);
 879                         }
 880                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
 881                         continue;
 882
 883                 case O(ASSEMBLE, BackupFile):
 884                 case O(GROW, BackupFile):
 885                         /* Specify a file into which grow might place a backup,
 886                          * or from which assemble might recover a backup
 887                          */
 888                         if (backup_file) {
 889                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
 890                                 exit(2);
 891                         }
 892                         backup_file = optarg;
 893                         continue;
 894
 895                 case O(BUILD,'b'):
 896                 case O(CREATE,'b'): /* here we create the bitmap */
 897                         if (strcmp(optarg, "none") == 0) {
 898                                 fprintf(stderr, Name ": '--bitmap none' only"
 899                                         " support for --grow\n");
 900                                 exit(2);
 901                         }
 902                         /* FALL THROUGH */
 903                 case O(GROW,'b'):
 904                         if (strcmp(optarg, "internal")== 0 ||
 905                             strcmp(optarg, "none")== 0 ||
 906                             strchr(optarg, '/') != NULL) {
 907                                 bitmap_file = optarg;
 908                                 continue;
 909                         }
 910                         /* probable typo */
 911                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n"
 912                                 "       not '%s'\n", optarg);
 913                         exit(2);
 914
 915                 case O(GROW,BitmapChunk):
 916                 case O(BUILD,BitmapChunk):
 917                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
 918                         bitmap_chunk = strtol(optarg, &c, 10);
 919                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
 920                                         bitmap_chunk & (bitmap_chunk - 1)) {
 921                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
 922                                                 optarg);
 923                                 exit(2);
 924                         }
 925                         /* convert K to B, chunk of 0K means 512B */
 926                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
 927                         continue;
 928
 929                 case O(GROW, WriteBehind):
 930                 case O(BUILD, WriteBehind):
 931                 case O(CREATE, WriteBehind): /* write-behind mode */
 932                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
 933                         if (optarg) {
 934                                 write_behind = strtol(optarg, &c, 10);
 935                                 if (write_behind < 0 || *c ||
 936                                     write_behind > 16383) {
 937                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
 938                                         exit(2);
 939                                 }
 940                         }
 941                         continue;
 942
 943                 case O(INCREMENTAL, 'r'):
 944                         rebuild_map = 1;
 945                         continue;
 946                 }
 947                 /* We have now processed all the valid options. Anything else is
 948                  * an error
 949                  */
 950                 if (option_index > 0)
 951                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
 952                                 long_options[option_index].name,
 953                                 map_num(modes, mode));
 954                 else
 955                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
 956                                 opt, map_num(modes, mode));
 957                 exit(2);
 958
 959         }
 960
 961         if (print_help) {
 962                 char *help_text = Help;
 963                 if (print_help == 2)
 964                         help_text = OptionHelp;
 965                 else
 966                         switch (mode) {
 967                         case ASSEMBLE : help_text = Help_assemble; break;
 968                         case BUILD    : help_text = Help_build; break;
 969                         case CREATE   : help_text = Help_create; break;
 970                         case MANAGE   : help_text = Help_manage; break;
 971                         case MISC     : help_text = Help_misc; break;
 972                         case MONITOR  : help_text = Help_monitor; break;
 973                         case GROW     : help_text = Help_grow; break;
 974                         case INCREMENTAL:help_text= Help_incr; break;
 975                         }
 976                 fputs(help_text,stdout);
 977                 exit(0);
 978         }
 979
 980         if (!mode && devs_found) {
 981                 mode = MISC;
 982                 devmode = 'Q';
 983                 if (devlist->disposition == 0)
 984                         devlist->disposition = devmode;
 985         }
 986         if (!mode) {
 987                 fputs(Usage, stderr);
 988                 exit(2);
 989         }
 990
 991         if (symlinks) {
 992                 struct createinfo *ci = conf_get_create_info();
 993
 994                 if (strcasecmp(symlinks, "yes") == 0)
 995                         ci->symlinks = 1;
 996                 else if (strcasecmp(symlinks, "no") == 0)
 997                         ci->symlinks = 0;
 998                 else {
 999                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
1000                         exit(2);
1001                 }
1002         }
1003         /* Ok, got the option parsing out of the way
1004          * hopefully it's mostly right but there might be some stuff
1005          * missing
1006          *
1007          * That is mosty checked in the per-mode stuff but...
1008          *
1009          * For @,B,C  and A without -s, the first device listed must be an md device
1010          * we check that here and open it.
1011          */
1012
1013         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
1014             (mode == ASSEMBLE && ! scan)) {
1015                 if (devs_found < 1) {
1016                         fprintf(stderr, Name ": an md device must be given in this mode\n");
1017                         exit(2);
1018                 }
1019                 if ((int)ident.super_minor == -2 && autof) {
1020                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
1021                         exit(2);
1022                 }
1023                 if (mode == MANAGE || mode == GROW) {
1024                         mdfd = open_mddev(devlist->devname, 1);
1025                         if (mdfd < 0)
1026                                 exit(1);
1027                 } else
1028                         /* non-existent device is OK */
1029                         mdfd = open_mddev(devlist->devname, 0);
1030                 if (mdfd == -2) {
1031                         fprintf(stderr, Name ": device %s exists but is not an "
1032                                 "md array.\n", devlist->devname);
1033                         exit(1);
1034                 }
1035                 if ((int)ident.super_minor == -2) {
1036                         struct stat stb;
1037                         if (mdfd < 0) {
1038                                 fprintf(stderr, Name ": --super-minor=dev given, and "
1039                                         "listed device %s doesn't exist.\n",
1040                                         devlist->devname);
1041                                 exit(1);
1042                         }
1043                         fstat(mdfd, &stb);
1044                         ident.super_minor = minor(stb.st_rdev);
1045                 }
1046                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1047                         /* We don't really want this open yet, we just might
1048                          * have wanted to check some things
1049                          */
1050                         close(mdfd);
1051                         mdfd = -1;
1052                 }
1053         }
1054
1055         if (raiddisks) {
1056                 if (raiddisks == 1 &&  !force && level != -5) {
1057                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1058                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1059                                 "     setting the number of drives.\n");
1060                         exit(2);
1061                 }
1062         }
1063
1064         if (homehost == NULL)
1065                 homehost = conf_get_homehost(&require_homehost);
1066         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1067                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1068                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1069                         homehost = sys_hostname;
1070                 }
1071         }
1072
1073         if ((mode != MISC || devmode != 'E') &&
1074             geteuid() != 0) {
1075                 fprintf(stderr, Name ": must be super-user to perform this action\n");
1076                 exit(1);
1077         }
1078
1079         ident.autof = autof;
1080
1081         rv = 0;
1082         switch(mode) {
1083         case MANAGE:
1084                 /* readonly, add/remove, readwrite, runstop */
1085                 if (readonly>0)
1086                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1087                 if (!rv && devs_found>1)
1088                         rv = Manage_subdevs(devlist->devname, mdfd,
1089                                             devlist->next, verbose-quiet, test);
1090                 if (!rv && readonly < 0)
1091                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1092                 if (!rv && runstop)
1093                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1094                 break;
1095         case ASSEMBLE:
1096                 if (devs_found == 1 && ident.uuid_set == 0 &&
1097                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1098                         /* Only a device has been given, so get details from config file */
1099                         mddev_ident_t array_ident = conf_get_ident(devlist->devname);
1100                         if (array_ident == NULL) {
1101                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1102                                         devlist->devname);
1103                                 rv |= 1;
1104                                 if (mdfd >= 0)
1105                                         close(mdfd);
1106                         } else {
1107                                 if (array_ident->autof == 0)
1108                                         array_ident->autof = autof;
1109                                 rv |= Assemble(ss, devlist->devname, array_ident,
1110                                                NULL, backup_file,
1111                                                readonly, runstop, update,
1112                                                homehost, require_homehost,
1113                                                verbose-quiet, force);
1114                         }
1115                 } else if (!scan)
1116                         rv = Assemble(ss, devlist->devname, &ident,
1117                                       devlist->next, backup_file,
1118                                       readonly, runstop, update,
1119                                       homehost, require_homehost,
1120                                       verbose-quiet, force);
1121                 else if (devs_found>0) {
1122                         if (update && devs_found > 1) {
1123                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1124                                 exit(1);
1125                         }
1126                         if (backup_file && devs_found > 1) {
1127                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1128                                 exit(1);
1129                         }
1130                         for (dv = devlist ; dv ; dv=dv->next) {
1131                                 mddev_ident_t array_ident = conf_get_ident(dv->devname);
1132                                 if (array_ident == NULL) {
1133                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1134                                                 dv->devname);
1135                                         rv |= 1;
1136                                         continue;
1137                                 }
1138                                 if (array_ident->autof == 0)
1139                                         array_ident->autof = autof;
1140                                 rv |= Assemble(ss, dv->devname, array_ident,
1141                                                NULL, backup_file,
1142                                                readonly, runstop, update,
1143                                                homehost, require_homehost,
1144                                                verbose-quiet, force);
1145                         }
1146                 } else {
1147                         mddev_ident_t a, array_list =  conf_get_ident(NULL);
1148                         mddev_dev_t devlist = conf_get_devs();
1149                         int cnt = 0;
1150                         int failures, successes;
1151                         if (devlist == NULL) {
1152                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1153                                 exit(1);
1154                         }
1155                         if (update) {
1156                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1157                                 exit(1);
1158                         }
1159                         if (backup_file) {
1160                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1161                                 exit(1);
1162                         }
1163                         for (a = array_list; a ; a = a->next) {
1164                                 a->assembled = 0;
1165                                 if (a->autof == 0)
1166                                         a->autof = autof;
1167                         }
1168                         do {
1169                                 failures = 0;
1170                                 successes = 0;
1171                                 rv = 0;
1172                                 for (a = array_list; a ; a = a->next) {
1173                                         int r;
1174                                         if (a->assembled)
1175                                                 continue;
1176                                         if (a->devname &&
1177                                             strcasecmp(a->devname, "<ignore>") == 0)
1178                                                 continue;
1179
1180                                         r = Assemble(ss, a->devname,
1181                                                      a,
1182                                                      NULL, NULL,
1183                                                      readonly, runstop, NULL,
1184                                                      homehost, require_homehost,
1185                                                      verbose-quiet, force);
1186                                         if (r == 0) {
1187                                                 a->assembled = 1;
1188                                                 successes++;
1189                                         } else
1190                                                 failures++;
1191                                         rv |= r;
1192                                         cnt++;
1193                                 }
1194                         } while (failures && successes);
1195                         if (homehost && cnt == 0) {
1196                                 /* Maybe we can auto-assemble something.
1197                                  * Repeatedly call Assemble in auto-assemble mode
1198                                  * until it fails
1199                                  */
1200                                 int rv2;
1201                                 int acnt;
1202                                 ident.autof = autof;
1203                                 do {
1204                                         mddev_dev_t devlist = conf_get_devs();
1205                                         acnt = 0;
1206                                         do {
1207                                                 rv2 = Assemble(ss, NULL,
1208                                                                &ident,
1209                                                                devlist, NULL,
1210                                                                readonly, runstop, NULL,
1211                                                                homehost, require_homehost,
1212                                                                verbose-quiet, force);
1213                                                 if (rv2==0) {
1214                                                         cnt++;
1215                                                         acnt++;
1216                                                 }
1217                                                 if (rv2 == 1)
1218                                                         /* found something so even though assembly failed  we
1219                                                          * want to avoid auto-updates
1220                                                          */
1221                                                         auto_update_home = 0;
1222                                         } while (rv2!=2);
1223                                         /* Incase there are stacked devices, we need to go around again */
1224                                 } while (acnt);
1225 #if 0
1226                                 if (cnt == 0 && auto_update_home && homehost) {
1227                                         /* Nothing found, maybe we need to bootstrap homehost info */
1228                                         do {
1229                                                 acnt = 0;
1230                                                 do {
1231                                                         rv2 = Assemble(ss, NULL,
1232                                                                        &ident,
1233                                                                        NULL, NULL,
1234                                                                        readonly, runstop, "homehost",
1235                                                                        homehost, require_homehost,
1236                                                                        verbose-quiet, force);
1237                                                         if (rv2==0) {
1238                                                                 cnt++;
1239                                                                 acnt++;
1240                                                         }
1241                                                 } while (rv2!=2);
1242                                                 /* Incase there are stacked devices, we need to go around again */
1243                                         } while (acnt);
1244                                 }
1245 #endif
1246                                 if (cnt == 0 && rv == 0) {
1247                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1248                                         rv = 1;
1249                                 } else if (cnt)
1250                                         rv = 0;
1251                         } else if (cnt == 0 && rv == 0) {
1252                                 fprintf(stderr, Name ": No arrays found in config file\n");
1253                                 rv = 1;
1254                         }
1255                 }
1256                 break;
1257         case BUILD:
1258                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1259                 if (write_behind && !bitmap_file) {
1260                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1261                         rv = 1;
1262                         break;
1263                 }
1264                 if (raiddisks == 0) {
1265                         fprintf(stderr, Name ": no raid-devices specified.\n");
1266                         rv = 1;
1267                         break;
1268                 }
1269
1270                 if (bitmap_file) {
1271                         if (strcmp(bitmap_file, "internal")==0) {
1272                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1273                                 rv |= 1;
1274                                 break;
1275                         }
1276                 }
1277                 rv = Build(devlist->devname, chunk, level, layout,
1278                            raiddisks, devlist->next, assume_clean,
1279                            bitmap_file, bitmap_chunk, write_behind,
1280                            delay, verbose-quiet, autof, size);
1281                 break;
1282         case CREATE:
1283                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1284                 if (write_behind && !bitmap_file) {
1285                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1286                         rv = 1;
1287                         break;
1288                 }
1289                 if (raiddisks == 0) {
1290                         fprintf(stderr, Name ": no raid-devices specified.\n");
1291                         rv = 1;
1292                         break;
1293                 }
1294
1295                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1296                             raiddisks, sparedisks, ident.name, homehost,
1297                             ident.uuid_set ? ident.uuid : NULL,
1298                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1299                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1300                 break;
1301         case MISC:
1302                 if (devmode == 'E') {
1303                         if (devlist == NULL && !scan) {
1304                                 fprintf(stderr, Name ": No devices to examine\n");
1305                                 exit(2);
1306                         }
1307                         if (devlist == NULL)
1308                                 devlist = conf_get_devs();
1309                         if (devlist == NULL) {
1310                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1311                                 exit(1);
1312                         }
1313                         if (brief && verbose)
1314                                 brief = 2;
1315                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1316                                      export, scan,
1317                                      SparcAdjust, ss, homehost);
1318                 } else if (devmode == DetailPlatform) {
1319                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1320                 } else {
1321                         if (devlist == NULL) {
1322                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1323                                         /* apply --detail or --wait-clean to
1324                                          * all devices in /proc/mdstat
1325                                          */
1326                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1327                                         struct mdstat_ent *e;
1328                                         struct map_ent *map = NULL;
1329                                         int members;
1330                                         int v = verbose>1?0:verbose+1;
1331
1332                                         for (members = 0; members <= 1; members++) {
1333                                         for (e=ms ; e ; e=e->next) {
1334                                                 char *name;
1335                                                 struct map_ent *me;
1336                                                 int member = e->metadata_version &&
1337                                                         strncmp(e->metadata_version,
1338                                                                 "external:/", 10) == 0;
1339                                                 if (members != member)
1340                                                         continue;
1341                                                 me = map_by_devnum(&map, e->devnum);
1342                                                 if (me && me->path
1343                                                     && strcmp(me->path, "/unknown") != 0)
1344                                                         name = me->path;
1345                                                 else
1346                                                         name = get_md_name(e->devnum);
1347
1348                                                 if (!name) {
1349                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1350                                                                 e->dev);
1351                                                         continue;
1352                                                 }
1353                                                 if (devmode == 'D')
1354                                                         rv |= Detail(name, v,
1355                                                                      export, test,
1356                                                                      homehost);
1357                                                 else
1358                                                         rv |= WaitClean(name, -1, v);
1359                                                 put_md_name(name);
1360                                         }
1361                                         }
1362                                         free_mdstat(ms);
1363                                 } else  if (devmode == 'S' && scan) {
1364                                         /* apply --stop to all devices in /proc/mdstat */
1365                                         /* Due to possible stacking of devices, repeat until
1366                                          * nothing more can be stopped
1367                                          */
1368                                         int progress=1, err;
1369                                         int last = 0;
1370                                         do {
1371                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1372                                                 struct mdstat_ent *e;
1373
1374                                                 if (!progress) last = 1;
1375                                                 progress = 0; err = 0;
1376                                                 for (e=ms ; e ; e=e->next) {
1377                                                         char *name = get_md_name(e->devnum);
1378
1379                                                         if (!name) {
1380                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1381                                                                         e->dev);
1382                                                                 continue;
1383                                                         }
1384                                                         mdfd = open_mddev(name, 1);
1385                                                         if (mdfd >= 0) {
1386                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1387                                                                         err = 1;
1388                                                                 else
1389                                                                         progress = 1;
1390                                                                 close(mdfd);
1391                                                         }
1392
1393                                                         put_md_name(name);
1394                                                 }
1395                                                 free_mdstat(ms);
1396                                         } while (!last && err);
1397                                         if (err) rv |= 1;
1398                                 } else {
1399                                         fprintf(stderr, Name ": No devices given.\n");
1400                                         exit(2);
1401                                 }
1402                         }
1403                         for (dv=devlist ; dv; dv=dv->next) {
1404                                 switch(dv->disposition) {
1405                                 case 'D':
1406                                         rv |= Detail(dv->devname,
1407                                                      brief?1+verbose:0,
1408                                                      export, test, homehost);
1409                                         continue;
1410                                 case 'K': /* Zero superblock */
1411                                         if (ss)
1412                                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1413                                         else {
1414                                                 int q = quiet;
1415                                                 do {
1416                                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1417                                                         q = 1;
1418                                                 } while (rv == 0);
1419                                                 rv &= ~2;
1420                                         }
1421                                         continue;
1422                                 case 'Q':
1423                                         rv |= Query(dv->devname); continue;
1424                                 case 'X':
1425                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1426                                 case 'W':
1427                                         rv |= Wait(dv->devname); continue;
1428                                 case Waitclean:
1429                                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1430                                 case KillSubarray:
1431                                         rv |= Kill_subarray(dv->devname, subarray, quiet);
1432                                         continue;
1433                                 case UpdateSubarray:
1434                                         if (update == NULL) {
1435                                                 fprintf(stderr,
1436                                                         Name ": -U/--update must be specified with --update-subarray\n");
1437                                                 rv |= 1;
1438                                                 continue;
1439                                         }
1440                                         rv |= Update_subarray(dv->devname, subarray, update, &ident, quiet);
1441                                         continue;
1442                                 }
1443                                 mdfd = open_mddev(dv->devname, 1);
1444                                 if (mdfd>=0) {
1445                                         switch(dv->disposition) {
1446                                         case 'R':
1447                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1448                                         case 'S':
1449                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1450                                         case 'o':
1451                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1452                                         case 'w':
1453                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1454                                         }
1455                                         close(mdfd);
1456                                 } else
1457                                         rv |= 1;
1458                         }
1459                 }
1460                 break;
1461         case MONITOR:
1462                 if (!devlist && !scan) {
1463                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1464                         rv = 1;
1465                         break;
1466                 }
1467                 if (pidfile && !daemonise) {
1468                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1469                         rv = 1;
1470                         break;
1471                 }
1472                 if (delay == 0) {
1473                         if (get_linux_version() > 20616)
1474                                 /* mdstat responds to poll */
1475                                 delay = 1000;
1476                         else
1477                                 delay = 60;
1478                 }
1479                 rv= Monitor(devlist, mailaddr, program,
1480                             delay?delay:60, daemonise, scan, oneshot,
1481                             dosyslog, test, pidfile, increments);
1482                 break;
1483
1484         case GROW:
1485                 if (array_size >= 0) {
1486                         /* alway impose array size first, independent of
1487                          * anything else
1488                          * Do not allow level or raid_disks changes at the
1489                          * same time as that can be irreversibly destructive.
1490                          */
1491                         struct mdinfo sra;
1492                         int err;
1493                         if (raiddisks || level != UnSet) {
1494                                 fprintf(stderr, Name ": cannot change array size in same operation "
1495                                         "as changing raiddisks or level.\n"
1496                                         "    Change size first, then check that data is still intact.\n");
1497                                 rv = 1;
1498                                 break;
1499                         }
1500                         sysfs_init(&sra, mdfd, 0);
1501                         if (array_size == 0)
1502                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1503                         else
1504                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1505                         if (err < 0) {
1506                                 if (errno == E2BIG)
1507                                         fprintf(stderr, Name ": --array-size setting"
1508                                                 " is too large.\n");
1509                                 else
1510                                         fprintf(stderr, Name ": current kernel does"
1511                                                 " not support setting --array-size\n");
1512                                 rv = 1;
1513                                 break;
1514                         }
1515                 }
1516                 if (devs_found > 1) {
1517
1518                         /* must be '-a'. */
1519                         if (size >= 0 || raiddisks || chunk || layout_str != NULL || bitmap_file) {
1520                                 fprintf(stderr, Name ": --add cannot be used with other geometry changes in --grow mode\n");
1521                                 rv = 1;
1522                                 break;
1523                         }
1524                         for (dv=devlist->next; dv ; dv=dv->next) {
1525                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1526                                 if (rv)
1527                                         break;
1528                         }
1529                 } else if (bitmap_file) {
1530                         if (size >= 0 || raiddisks || chunk || layout_str != NULL) {
1531                                 fprintf(stderr, Name ": --bitmap changes cannot be used with other geometry changes in --grow mode\n");
1532                                 rv = 1;
1533                                 break;
1534                         }
1535                         if (delay == 0)
1536                                 delay = DEFAULT_BITMAP_DELAY;
1537                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1538                                             bitmap_chunk, delay, write_behind, force);
1539                 } else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1540                            || chunk != 0 || level != UnSet) {
1541                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1542                                           size, level, layout_str, chunk, raiddisks);
1543                 } else if (array_size < 0)
1544                         fprintf(stderr, Name ": no changes to --grow\n");
1545                 break;
1546         case INCREMENTAL:
1547                 if (rebuild_map) {
1548                         RebuildMap();
1549                 }
1550                 if (scan) {
1551                         if (runstop <= 0) {
1552                                 fprintf(stderr, Name
1553                          ": --incremental --scan meaningless without --run.\n");
1554                                 break;
1555                         }
1556                         if (devmode == 'f') {
1557                                 fprintf(stderr, Name
1558                          ": --incremental --scan --fail not supported.\n");
1559                                 break;
1560                         }
1561                         rv = IncrementalScan(verbose);
1562                 }
1563                 if (!devlist) {
1564                         if (!rebuild_map && !scan) {
1565                                 fprintf(stderr, Name
1566                                         ": --incremental requires a device.\n");
1567                                 rv = 1;
1568                         }
1569                         break;
1570                 }
1571                 if (devlist->next) {
1572                         fprintf(stderr, Name
1573                                ": --incremental can only handle one device.\n");
1574                         rv = 1;
1575                         break;
1576                 }
1577                 if (devmode == 'f') {
1578                         rv = IncrementalRemove(devlist->devname, verbose-quiet);
1579                         break;
1580                 }
1581                 rv = Incremental(devlist->devname, verbose-quiet, runstop,
1582                                  ss, homehost, require_homehost, autof);
1583                 break;
1584         case AUTODETECT:
1585                 autodetect();
1586                 break;
1587         }
1588         exit(rv);
1589 }